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Posts Tagged: body control module

BCM body control module

What does a BCM body control module do? A body control module (BCM) is a computer used to control electrical items in a car or truck which used to be controlled individually by switches. Car makers switched to this design for several reasons: to reduce overall vehicle weight by reducing the size and quantity of copper wire used, to monitor and control power usage, to allow for remote operation and diagnostics. BCM can switch power to lights For example, in non-computerized vehicles, the power for headlights was supplied by a … Read More

Central Timer Module, body control module, gem module

What the heck is a Central Timer Module, body control module, gem module As I read auto forums I constantly hear people asking what a body control module does, where it’s located and how to fix it. These computers are known by several different names. Central Timer Module, body control module, gem module. Every car maker is switching to digital controls for almost all vehicle functions. It’s an effort to reduce wiring costs and complexity, reduce weight, and have complete control over all systems to further increase MPG. To understand … Read More


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